Cepheus-CEP does not hold multiple subscription in multi-tenant mode

[pooja1pathak]

Hi @marcc-orange as per our discussion on #79 , I was having issue:

Every-time CEP receives any configuration, it first unsubscribes from the previous Provider and then subscribe to the new Provider as given in the configuration. In this way Cepheus-CEP have multiple configuration files but only one subscription at a time even when multi-tenancy is enabled.

I tried to use Docker containers for running Cepheus but I am unable to find application.properties or cep.peroperties or any config file which can be used to enable multi-tenancy.

Please guide me with the steps to enable multi-tenancy in Docker container environment.

I also want to contribute on this bug fix.